Replacement derailleur hanger for various bicyclesWheels Manufacturing was started in 1988 in Boulder, Colorado. What started in a small machine shop producing cog removal tools and chainring spacers quickly blossomed into a large scale manufacturing facility producing a full line of small parts totaling over 800 products.Wheels Manufacturing was started in 1988 in Boulder, Colorado. What started in a small machine shop producing cog removal tools and chainring spacers quickly blossomed into a large scale manufacturing facility producing a full line of small parts totaling over 800 products.